Slag ( German Schlacke ) in metallurgy is a by-product or waste from metal production, after purification from the remains of valuable components ( depletion ) sent to the dump . However, in some cases, the main melting product containing the most valuable component of the raw material is precisely slag ( titanium slags obtained by melting ilmenite concentrates; vanadium slags formed during the conversion of vanadium-containing cast iron ).
Application
Slag is used for the manufacture of building materials ( brick , tile ), as an additive to cement (there are also cements completely made from slag), as a fertilizer . Also, slag is solid waste from some chemical industries and sintered ash from the burning of hard and soft fuels (for example, coal or fuel oil ). [one]
Blast furnace slag, as a rule, undergo granulation [2] . The main ways of utilizing slag from steelmaking are as follows:
- metal recovery;
- obtaining iron flux for cupola furnaces and sintering production;
- obtaining crushed stone for road and industrial construction;
- the use of basic slag as calcareous fertilizers (slag flour) for agriculture ;
- the use of phosphorus-containing slag for fertilizers for agriculture;
- Recycling of final steelmaking slags [3] .
See also
- Terricon
- Tomosclack
- Cinder block
- Kupershlak
- Impoverishment
- Sludge
Notes
- β Slag (fuel)
- β Linchevsky, 1986 , p. 56.
- β Kudrin, 1989 , p. 533.
Literature
- Mendeleev D.I. , Mitinsky A.N .; -. Slags // Brockhaus and Efron Encyclopedic Dictionary : in 86 volumes (82 volumes and 4 additional). - SPb. , 1890-1907.
- Vanyukov A.V., Zaitsev V. Ya. Slags and mattes of non-ferrous metallurgy. - Moscow: Metallurgy, 1969 .-- 408 p.
- Linchevsky B.V., Sobolevsky A.L., Kalmenev A.A. Metallurgy of ferrous metals. - Moscow: Metallurgy, 1986. - 360 p.
- Kudrin V.A. Metallurgy of steel. Textbook for high schools. - Moscow: Metallurgy, 1989 .-- 560 p. - ISBN 5-229-00234-4 .